@decaf-ts/db-decorators
Version:
Agnostic database decorators and repository
64 lines (62 loc) • 8.26 kB
JavaScript
import { DBKeys } from "../model/constants";
import { getAllPropertyDecoratorsRecursive } from "../repository/utils";
import { ModelKeys, sf } from "@decaf-ts/decorator-validation";
import { InternalError } from "../repository/errors";
/**
* @summary Returns the primary key attribute for a {@link Model}
* @description searches in all the properties in the object for an {@link id} decorated property
*
* @param {Model} model
*
* @throws {InternalError} if no property or more than one properties are {@link id} decorated
* or no value is set in that property
*
* @function findPrimaryKey
*
* @category managers
*/
export function findPrimaryKey(model) {
const decorators = getAllPropertyDecoratorsRecursive(model, undefined, DBKeys.REFLECT + DBKeys.ID);
const idDecorators = Object.entries(decorators).reduce((accum, [prop, decs]) => {
const filtered = decs.filter((d) => d.key !== ModelKeys.TYPE);
if (filtered && filtered.length) {
accum[prop] = accum[prop] || [];
accum[prop].push(...filtered);
}
return accum;
}, {});
if (!idDecorators || !Object.keys(idDecorators).length)
throw new InternalError("Could not find ID decorated Property");
if (Object.keys(idDecorators).length > 1)
throw new InternalError(sf(Object.keys(idDecorators).join(", ")));
const idProp = Object.keys(idDecorators)[0];
if (!idProp)
throw new InternalError("Could not find ID decorated Property");
return {
id: idProp,
props: idDecorators[idProp][0].props,
};
}
/**
* @summary Returns the primary key value for a {@link Model}
* @description searches in all the properties in the object for an {@link pk} decorated property
*
* @param {Model} model
* @param {boolean} [returnEmpty]
* @return {string} primary key
*
* @throws {InternalError} if no property or more than one properties are {@link pk} decorated
* @throws {NotFoundError} returnEmpty is false and no value is set on the {@link pk} decorated property
*
* @function findModelID
*
* @category managers
*/
export function findModelId(model, returnEmpty = false) {
const idProp = findPrimaryKey(model).id;
const modelId = model[idProp];
if (!modelId && !returnEmpty)
throw new InternalError(sf("No value for the Id is defined under the property {0}", idProp));
return modelId;
}
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